Upstream information

CVE-2026-23953 at MITRE

Description

Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the 'incus' group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container's lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can be confirmed with a second container with /tmp mounted from the host (A privileged action for validation only). A fix is planned for versions 6.0.6
and 6.21.0, but they have not been released at the time of publication.

SUSE information

Overall state of this security issue: Does not affect SUSE products

SUSE Bugzilla entry: 1257141 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • incus >= 6.22-1.1
  • incus-bash-completion >= 6.22-1.1
  • incus-fish-completion >= 6.22-1.1
  • incus-tools >= 6.22-1.1
  • incus-zsh-completion >= 6.22-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10280

SUSE Timeline for this CVE

CVE page created: Fri Jan 23 00:03:31 2026
CVE page last modified: Fri May 8 12:08:46 2026